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EG4 48V 314Ah All Weather WallMount LiFePO4 Battery + FlexBOSS21 16kW 48V Split Phase AC Hybrid Inverter - Off Grid Stores
by EG4

EG4 48V 314Ah All Weather WallMount LiFePO4 Battery + FlexBOSS21 16kW 48V Split Phase AC Hybrid Inverter

SKU: K0280
Save $9,903.75 Save $2,140.00
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Bundle Options: 1 x All Weather Battery + FlexBOSS21 Inverter

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EG4 48V 314Ah All Weather WallMount LiFePO4 Battery + FlexBOSS21 16kW 48V Split Phase AC Hybrid Inverter

EG4 48V 314Ah All Weather WallMount LiFePO4 Battery + FlexBOSS21 16kW 48V Split Phase AC Hybrid Inverter

Meet the EG4 WallMount 314Ah AllWeather Battery — a high-capacity, outdoor-ready energy storage unit built for installs where space, weather, and long runtimes all matter. Delivering 16kWh at 51.2V, it’s designed to be a dependable backbone for solar-plus-storage, off-grid power, or whole-home backup setups that need serious capacity with straightforward expandability.

At the core are lithium iron phosphate (LiFePO₄) cells paired with EG4’s smart BMS for stable performance and long service life, plus active cell balancing to help keep the pack operating efficiently over time. The enclosure is purpose-built for exterior placements with an IP67 rating, and internal heaters support reliable operation when temperatures drop. For day-to-day ownership and long-term maintenance, Bluetooth + Wi-Fi connectivity enables live status checks and over-the-air firmware updates through the EG4 app—so the system stays current without hassle.

Why it stands out

  • Big usable capacity: 16kWh (314Ah) for extended runtime and stronger backup coverage
  • True outdoor protection: IP67 enclosure built to handle dust, water, and harsh conditions
  • Smarter control: EG4 smart BMS with active cell balancing for better efficiency and longevity
  • Connected ownership: Bluetooth/Wi-Fi monitoring + OTA updates via the EG4 app
  • Cold-weather confidence: Built-in heaters for reliable performance in colder climates
  • Simplified scaling: Auto-addressing and closed-loop integration with EG4 inverters/batteries

Best-fit applications

A strong choice for residential and light commercial solar storage, outdoor battery banks, off-grid power systems, and backup power where durability, monitoring, and easy expansion are priorities.

 

Specifications:

EG4 48V 314Ah AllWeather WallMount LiFePO4 Battery
Product Type LFP Battery
Battery Type Lithium Iron Phosphate (LFP)
Nominal Energy Capacity 16 kWh
Usable Energy (DOD) 12.86 kWh (80% recommended)
Voltage Range 47.5 – 57.6 VDC
Nominal Voltage 51.2 VDC
Capacity 314 Ah
Charging Voltage Range 56 – 57 VDC
Discharging Cut-off Voltage 47.5 VDC
Max Continuous Charge Current 157 A
Max Continuous Discharge Current 200 A
Continuous Charge/Discharge Power 8 / 10.2 kW
Recommended Charge/Discharge Rate 0.5C
Peak Power 12.8 kW (3 sec)
Round-trip Efficiency 95%
Max Parallel Units 32
Protection Over/Under Voltage, Over-Current,
Short Circuit, High/Low Temp
BMS Integrated, Active Balancing
Communication Protocols RS485, CAN
Battery Breaker 250 A
Storage Temperature -4 – 131°F
Humidity Range 5% – 95% RH (non-condensing)
Altitude 9843 ft. (<3000 m)
Cooling Method Natural Convection
Dimensions (H × W × D) 34.6 × 21.7 × 9.3 in
Operating Temperature Range Charge: 32–122°F
Discharging: -4–131°F
Recommended DOD Setting EG4 recommends this value be set
no lower than 20% to maintain the
recommended 80% Depth of Discharge.
Storage Temperature Less than 3 months of storage.
If longer than 3 months, recommended
storage temperature will be 59–86°F
Weight 309 lbs
Enclosure Rating IP67
Mounting Options Wall attached / Floor mount
Display / Indicators LED Status
Connector Type Degson quick connector / screw terminal
UL 1973 Pending
UL 9540 Pending
UL 9540A Pending
UN 38.3 Pending
Cycle Life (70% EOL Capacity) 10,000 cycles @ 0.5C, 25°C, 80% DOD
Design Life 15 years
Application Type Residential / Commercial / Off-grid / Backup
Lifetime Energy Throughput 122.2 MWh
EG4 FlexBOSS21 16kW 48V Split Phase AC Hybrid Inverter
Nominal AC Voltage 120/240VAC | 120/208VAC (L1/L2/N required)
Frequency 60 Hz (Default) | 50 Hz
Max. AC Current 50A @ 240V | 57.7A @ 208V
Max. AC Input Power 12000W
Max. AC Bypass 90A
Operating Voltage Range 180 - 270VAC
Output Voltage 120/240VAC | 120/208VAC (L1/L2/N required)
Max. Output Current 66.7A
Output Frequency 60 Hz (Default) | 50 Hz
Nominal Output Power (without PV) 12000W @ 240V | 12000W @ 208V
Nominal Output Power (with PV) 16000W @ 240V | 13800kW @ 208V
Power Factor 0.99 (Full Load)
Reactive Power Adjustment Range -0.8 - 0.8 Leading Adjustable
Total Harmonic Distortion <5% (Full Load)
Transfer Time 20ms (Default) | 10ms
(Configurable) | 20ms (Parallel)
Rated Output Current 50A @ 240V | 57.7A @ 208V
Nominal Output Voltage 120/240VAC | 120/208VAC
Rated Output Power 12000W @ 240VAC | 12000W @ 208VAC
Peak Power 24000W (0.5 sec) | 18000W (1 sec)
15000W (6 min) | 13200W (12 min)
Operating Frequency 60 Hz (Default) | 50 Hz
Total Harmonic Distortion Voltage <5%
Transfer Time 20ms (Default) | 10ms (Configurable)
| 20ms (Parallel
No. of MPPTs 3
Inputs per MPPT 2 (MPPT 1) | 2 (MPPT 2) | 1 (MPPT 3)
Max. Usable Input Current 26A (MPPT 1) | 26A (MPPT 2) | 15A (MPPT 3)
Max. Short Circuit Input Current 31A (MPPT 1) | 31A (MPPT 2) | 19A (MPPT 3)
DC Input Voltage Range 100 - 600VDC
Unit Start-Up Voltage 100VDC
MPPT Operating Voltage Range 120 - 440VDC
Nominal MPPT Voltage 360VDC
Max. Utilized PV Array Power 21000W
Max. Recommended PV Input 25000W
Max. Efficiency 97% (PV to Grid) | 94.5%
(PV to Battery) | 94% (Battery to Grid)
Idle Consumption <65W
Nominal Voltage 48VDC
Voltage Range 40 - 60VDC
Max. Charge / Discharge Power 12000W
Recommended Battery
Capacity per Inverter		 >300Ah
Operating / Storage Temperature Range -13ºF - 140ºF
Operating Altitude <6,561 ft (2000 m)
Relative Humidity 0 - 100%
Typical Noise Emission <50dB @ 3 ft
Design Topology High-Frequency / Transformerless
Protection Rating IP65 / NEMA 4X
Communications RS485 / CANBus / WiFi
Max. Parallel Connections 16
Weight 88 lbs
Depth 11.3 in
Width 22.3 in
Height 30.5 in

PACKAGE INCLUDES

EG4 48V 314Ah All Weather WallMount LiFePO4 Battery + FlexBOSS21 16kW 48V Split Phase AC Hybrid Inverter

EG4 48V 314Ah AllWeather WallMount LiFePO4 Battery

x 1

EG4 FlexBOSS21 16kW 48V Split Phase AC Hybrid Inverter

x 1

EG4 PowerPro Conduit Box

x 1

Product Documents:

EG4 48V 314Ah All Weather WallMount LiFePO4 Battery User Manual

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EG4 48V 314Ah All Weather WallMount LiFePO4 Battery Specification Sheet

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EG4 48V 314Ah All Weather WallMount LiFePO4 Battery Certification Of Compliance

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EG4 48V 314Ah All Weather WallMount LiFePO4 Battery UL Certification

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EG4 FlexBOSS21 16kw 48V Split Phase AC Hybrid Inverter User Manual

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EG4 FlexBOSS21 16kw 48V Split Phase AC Hybrid Inverter Specification Sheet

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EG4 FlexBOSS21 16kw 48V Split Phase AC Hybrid Inverter Certification Of Compliance

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